Fix/system fingerprint nullable

[DongSeonYoo]

• I understand that this repository is auto-generated and my pull request may not be merged

Changes being requested

1. The system_fingerprint property's type definition does not match with actual response values from the API, which may include 'null'

• This causes issues in strict validation environments (e.g., typia).

2. Fix typo

• guarentee -> guarantee on each annotation

Additional context & links

system_fingerprint?: string | null;